CN211377614U - Circuit device for preventing spare power source lead-acid battery from over-discharging - Google Patents
Circuit device for preventing spare power source lead-acid battery from over-discharging Download PDFInfo
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- CN211377614U CN211377614U CN201922025989.2U CN201922025989U CN211377614U CN 211377614 U CN211377614 U CN 211377614U CN 201922025989 U CN201922025989 U CN 201922025989U CN 211377614 U CN211377614 U CN 211377614U
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- 239000002253 acid Substances 0.000 title claims abstract description 54
- 238000007599 discharging Methods 0.000 title abstract description 3
- 238000012360 testing method Methods 0.000 claims abstract description 41
- 238000005070 sampling Methods 0.000 claims abstract description 39
- 230000003993 interaction Effects 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 1
- 238000004146 energy storage Methods 0.000 abstract description 10
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model discloses a circuit device for preventing spare power supply lead-acid batteries from over-discharging, wherein a main breaker QF1 is a breaker with a shunt release and an auxiliary contact; the power supply input end of the controller is connected with a positive bus Pbus and a negative bus Nbus, and the first circuit breaking test port P1 is connected with the auxiliary contact of the main circuit breaker QF 1; the tripping control port P11 is connected with a shunt release of the main circuit breaker QF 1; a first voltage sampling endpoint T1 is arranged at the positive terminal of the lead-acid battery, and the first voltage sampling endpoint T1 is connected with a first voltage test port P31 of the controller. The controller can judge whether the lead-acid battery is about to generate an over-discharge condition by detecting the first voltage sampling endpoint T1, and control the main breaker QF1 to be disconnected, so that the lead-acid battery is disconnected from the circuit, the condition that the lead-acid battery is damaged due to over-discharge is avoided, and the maintenance cost of the energy storage charging pile is reduced.
Description
Technical Field
The utility model relates to an energy storage fills electric pile stand-by power supply device, especially relates to a prevent circuit arrangement of stand-by power supply lead acid battery overdischarge.
Background
In the electric pile is filled to current portable energy storage, be provided with stand-by power supply usually, what this stand-by power supply adopted usually is lead acid battery, and the purpose of setting up stand-by power supply is in order to deal with the energy storage and fills the electric pile in the energy storage battery package electric quantity low or the trouble and do not have the condition of outside complementary energy power input, under such condition, stand-by power supply can provide certain electric energy supply in order to maintain the normal operating of filling electric pile basic electrical function. However, when the working time of the lead-acid battery is too long, the lead-acid battery may be over-discharged, and the lead-acid battery may be permanently damaged once over-discharged, thereby increasing the maintenance cost of the energy storage charging pile.
Disclosure of Invention
An object of the utility model is to provide a prevent circuit arrangement of stand-by power supply lead acid battery overdischarge, the controller accessible detects first voltage sampling endpoint T1 and judges whether lead acid battery is about to take place the overdischarge condition to control lead acid battery and break off from the circuit, thereby avoided lead acid battery because of taking place the condition that the overdischarge damaged.
In order to realize the technical purpose, the utility model adopts the following technical scheme:
a circuit device for preventing lead-acid batteries of a standby power supply from being overdischarged comprises a main power supply, the lead-acid batteries, a main breaker QF1, a positive bus Pbus, a negative bus Nbus and a load; the positive end and the negative end of the main power supply are respectively connected with a positive bus Pbus and a negative bus Nbus; the positive end and the negative end of the load are respectively connected with a positive bus Pbus and a negative bus Nbus; the positive end and the negative end of the lead-acid battery are respectively connected with a positive bus Pbus and a negative bus Nbus through a main breaker QF 1; the main circuit breaker QF1 is a circuit breaker with a shunt release and an auxiliary contact; the circuit device also comprises a bypass breaker QF2, wherein the bypass breaker QF2 is a breaker with an auxiliary contact, and the bypass breaker QF2 is connected with the main breaker QF1 in parallel; the circuit device also comprises a controller and a human-computer interaction interface HMI, wherein the controller is connected with the human-computer interaction interface HMI through a communication line; the controller further comprises a first open circuit test port P1, a second open circuit test port P2, a tripping control port P11 and a first voltage test port P31; the first disconnection test port P1 includes two terminals connected to two ends of the auxiliary contact of the main breaker QF1, respectively; the second disconnection test port P2 includes two terminals connected to two ends of the auxiliary contact of the bypass breaker QF2, respectively; the tripping control port P11 comprises two terminals which are respectively connected with two ends of a shunt release coil of the main circuit breaker QF 1; a first voltage sampling endpoint T1 is arranged at the positive terminal of the lead-acid battery, and the first voltage sampling endpoint T1 is connected with a first voltage test port P31 of the controller.
Further, the circuit device further comprises a contactor K1, the positive bus Pbus comprises a first section of positive bus and a second section of positive bus, the first section of positive bus and the second section of positive bus are connected through a contactor K1, and a control end of the contactor K1 is controlled to be connected to the controller; the positive end of the lead-acid battery is connected with a first section of positive bus through a main breaker QF1, the positive end of the main power supply is connected with a second section of positive bus, and the positive end of the power supply input end of the controller is connected with the first section of positive bus; the load comprises an important load and a secondary load, the positive end of the important load is connected with the first section of positive bus, the positive end of the secondary load is connected with the second section of positive bus, and the negative ends of the important load and the secondary load are both connected with the negative bus Nbus; the controller further comprises a second voltage testing port P32 and a third voltage testing port P33, wherein the second voltage testing port P32 is connected with the second voltage sampling end point T2, and the third voltage testing port P33 is connected with the third voltage sampling end point T3.
Further, the circuit device further comprises a fuse FUS, wherein the fuse FUS is connected in series between the first voltage sampling endpoint T1 and a parallel circuit breaker, and the parallel circuit breaker is a main circuit breaker QF1 and a bypass circuit breaker QF2 which are connected in parallel.
The circuit device of the utility model is used in the movable energy storage charging pile, and compared with the traditional device, the circuit device is provided with a controller and a main breaker QF1 with a shunt release, and a first voltage sampling terminal T1 is arranged at the positive terminal of the lead-acid battery, the first voltage sampling terminal T1 is connected with a first voltage test port P31 of the controller, the controller can judge whether the lead-acid battery is about to generate over-discharge condition by detecting the first voltage sampling terminal T1, when the controller detects that the voltage value at the first voltage sampling node T1 is below a predetermined threshold, the controller considers that the lead-acid battery is close to over-discharge, the controller controls the main circuit breaker QF1 to be disconnected through the tripping control port P11, the lead-acid battery is disconnected from the circuit, thereby avoided lead-acid batteries to take place the condition that the overdischarge damaged, reduced the maintenance cost of energy storage charging pile.
Drawings
Fig. 1 is a circuit connection diagram of a circuit device for preventing overdischarge of a lead-acid battery of a backup power supply according to the present invention, in which P31 should be connected to T1, P32 should be connected to T2, and P33 should be connected to T3.
Detailed Description
The invention will be further described with reference to the following drawings and specific embodiments:
referring to fig. 1, the present embodiment provides a circuit arrangement for preventing over-discharge of a lead-acid battery of a backup power supply, the circuit arrangement including a main power supply, a lead-acid battery, a main breaker QF1, a positive bus Pbus, a negative bus Nbus, and a load.
The positive end and the negative end of the main power supply are respectively connected with a positive bus Pbus and a negative bus Nbus; the load specifically comprises an important load and a secondary load, wherein a positive end and a negative end of the important load are respectively connected with a positive bus Pbus and a negative bus Nbus, and similarly, a positive end and a negative end of the secondary load are respectively connected with the positive bus Pbus and the negative bus Nbus; and the positive end and the negative end of the lead-acid battery are respectively connected with a positive bus Pbus and a negative bus Nbus through a main breaker QF 1. In this embodiment, the important loads generally include a data interaction network control box, an energy storage battery pack controller, a human-computer interaction touch interface, a water immersion sensor, and the like, while the secondary loads generally include a direct current electric energy meter for metering the charging electric quantity of the electric vehicle, an advertisement screen heat dissipation fan, a complete machine heat dissipation fan, an electric vehicle charging output controller, an auxiliary source provided for the electric vehicle, a battery pack heat management system controller, and the like.
Further, the main circuit breaker QF1 is a circuit breaker with shunt release and auxiliary contacts; the circuit device also comprises a bypass breaker QF2, wherein the bypass breaker QF2 is a breaker with an auxiliary contact, and the bypass breaker QF2 is connected with the main breaker QF1 in parallel; the circuit device also comprises a controller and a human-computer interaction interface HMI, wherein the controller is connected with the human-computer interaction interface HMI through a communication line; the controller further comprises a first open circuit test port P1, a second open circuit test port P2, a tripping control port P11 and a first voltage test port P31; the first breaking test port P1 comprises two terminals, which are respectively connected with two ends of the auxiliary contact of the main breaker QF1 (not shown in the figure), and the controller can detect the opening condition of the auxiliary contact of the main breaker QF1 through the first breaking test port P1; the second breaking test port P2 comprises two terminals, which are respectively connected with two ends of the auxiliary contact of the bypass breaker QF2 (not shown in the figure), and the controller can detect the open condition of the auxiliary contact of the bypass breaker QF2 through the second breaking test port P2; the trip control port P11 includes two terminals, which are respectively connected to two ends of the shunt release coil of the main circuit breaker QF1 (not shown in the figure), and the controller can apply a control voltage to the control coil of the shunt release of the main circuit breaker QF1 through the trip control port P11 to trip the control coil, so as to disconnect the main circuit breaker QF1, more specifically, the voltage is 24V; a first voltage sampling endpoint T1 is arranged at the positive end of the lead-acid battery, the first voltage sampling endpoint T1 is connected with a first voltage testing port P31 of the controller (not shown in the figure), and the controller can detect the voltage condition at the first voltage sampling endpoint T1 through the first voltage testing port P31, and thus determine whether the lead-acid battery is in an overdischarge state.
The circuit device of the embodiment is mainly applied to the mobile energy storage charging pile, controls the low-voltage auxiliary power supply loop and prevents the lead-acid battery serving as a standby power supply from being over-discharged. When the circuit device of the embodiment normally works, the main breaker QF1 is in a closed state, the circuit device is powered by a main power supply, and the output power of the main power supply is simultaneously transmitted to a load and a lead-acid battery through the positive bus Pbus and the negative bus Nbus, so that the power demand of the load is ensured, and the charging state of the lead-acid battery is kept. When the main power supply is powered off due to a fault, the lead-acid battery starts to release electric energy, so that the electric energy supply to the load and the controller is maintained. However, if the main power supply cannot recover power supply later, and the lead-acid battery has too long power supply time, which may possibly cause damage of the lead-acid battery due to over-discharge, in order to prevent the situation, the controller determines the power condition of the lead-acid battery by detecting the voltage at the first voltage sampling end point T1, and when the measured voltage is lower than a preset threshold, the controller controls the main breaker QF1 to be disconnected through the trip control port P11, and determines whether the main breaker QF1 is disconnected or not by detecting the auxiliary contact of the main breaker QF1 through the first disconnection test port P1, so as to prevent the over-discharge of the lead-acid battery, and at the same time, the controller sends the disconnection information of the main breaker QF1 to the human-machine interface HMI and sends a warning message through the human-machine interface HMI. If the main power supply is recovered, the controller is powered on to start working, the bypass circuit breaker QF2 is manually operated to be closed, the main power supply recovers charging of the lead-acid battery, after the controller detects that the voltage at the first voltage sampling endpoint T1 is higher than a preset threshold value, the controller outputs prompt information through a human-computer interaction interface HMI to indicate that the main circuit breaker QF1 can be manually operated to be closed, then the main circuit breaker QF1 is manually operated to be closed and the bypass circuit breaker QF2 is disconnected, the controller releases an alarm, and the circuit device recovers a normal working state.
Preferably, the circuit device of the present embodiment further includes a contactor K1, the positive bus Pbus includes a first positive bus and a second positive bus, the first positive bus and the second positive bus are connected through a contactor K1, and a control terminal of the contactor K1 is controlled to be connected to a controller (not shown in the figure); the positive end of the lead-acid battery is connected with a first section of positive bus through a main breaker QF1, the positive end of the main power supply is connected with a second section of positive bus, and the positive end of the power supply input end of the controller is connected with the first section of positive bus (not shown in the figure); the positive end of the important load is connected with the first section of positive bus, the positive end of the secondary load is connected with the second section of positive bus, and the negative ends of the important load and the secondary load are both connected with the negative bus Nbus; the controller further includes a second voltage testing port P32 and a third voltage testing port P33, the second voltage testing port P32 is connected to a second voltage sampling terminal T2 (not shown), the third voltage testing port P33 is connected to a third voltage sampling terminal T3 (not shown), and the controller can detect the voltage states at the second voltage sampling terminal T2 and the third voltage sampling terminal T3 through the second voltage testing port P32 and the third voltage testing port P33.
In a more optimized circuit arrangement, in normal operating conditions, the main circuit breaker QF1 is closed, the bypass circuit breaker QF2 is open, the contactor K1 is closed, and the circuit arrangement is supplied with electrical energy from the main power supply. When the main power supply is powered off due to a reason, the controller detects that the voltage at the third voltage sampling end point T3 is low through the third voltage testing port P33, so that the power failure of the main power supply is judged, the controller controls the contactor K1 to be disconnected, and the lead-acid battery starts to release electric energy to maintain the electric energy supply to the first section of positive electrode bus. The opening of the contactor K1 also prevents the main power supply from impacting the entire circuit in a voltage unstable state. When the lead-acid battery is powered for too long, the controller controls the main circuit breaker QF1 to be switched off. And when the main power supply is recovered, the bypass circuit breaker QF2 is manually operated to be closed to recover the power supply to the controller, the controller judges whether the main power supply is normal or not by detecting whether the voltage at the third voltage sampling endpoint T3 is normal or not through the third voltage test port P33, if the main power supply is normal, the controller controls the contactor K1 to be closed, the main power supply starts to be normally supplied, after the controller detects that the voltage at the first voltage sampling endpoint T1 is higher than a preset threshold value, the controller outputs prompt information through a human-computer interaction interface HMI to indicate that the main circuit breaker QF1 can be manually operated to be closed, then the main circuit breaker QF1 is manually operated to be closed and the bypass circuit breaker QF2 is disconnected, the controller removes an alarm, and the circuit device recovers the normal working state.
Further preferably, the circuit arrangement further comprises a fuse FUS connected in series between the first voltage sampling terminal T1 and a parallel circuit breaker, which is a main circuit breaker QF1 and a bypass circuit breaker QF2 connected in parallel. Thus, overcurrent protection and short-circuit protection can be performed.
Regarding the first voltage sampling terminal T1, the second voltage sampling terminal T2, and the third voltage sampling terminal T3 provided in the present circuit apparatus, the condition of the circuit can be detected by comparing the voltage difference between the respective sampling terminals, if the voltage difference between the first voltage sampling terminal T1 and the second voltage sampling terminal T2 is not equal to zero, it can be determined that the fuse FUS is blown, and if the voltage difference between the third voltage sampling terminal T3 and the second voltage sampling terminal T2 is not equal to zero, it can be determined that the contactor K1 is in an open state, and the controller can determine the circuit condition by the comparison and present it through the human-machine interface HMI.
Compared with the traditional device, the circuit device of the embodiment is provided with the controller and the main circuit breaker QF1 with the shunt release, and when the controller detects that the lead-acid battery is close to overdischarge, the controller can control the main circuit breaker QF1 to be disconnected, so that the lead-acid battery is disconnected from the circuit, and the condition that the lead-acid battery is damaged due to overdischarge is avoided.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, therefore, any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (3)
1. A circuit device for preventing lead-acid batteries of a standby power supply from being overdischarged comprises a main power supply, the lead-acid batteries, a main breaker QF1, a positive bus Pbus, a negative bus Nbus and a load; the positive end and the negative end of the main power supply are respectively connected with a positive bus Pbus and a negative bus Nbus; the positive end and the negative end of the load are respectively connected with a positive bus Pbus and a negative bus Nbus; the positive end and the negative end of the lead-acid battery are respectively connected with a positive bus Pbus and a negative bus Nbus through a main breaker QF 1;
the method is characterized in that: the main circuit breaker QF1 is a circuit breaker with a shunt release and an auxiliary contact; the circuit device also comprises a bypass breaker QF2, wherein the bypass breaker QF2 is a breaker with an auxiliary contact, and the bypass breaker QF2 is connected with the main breaker QF1 in parallel; the circuit device also comprises a controller and a human-computer interaction interface HMI, wherein the controller is connected with the human-computer interaction interface HMI through a communication line; the controller further comprises a first open circuit test port P1, a second open circuit test port P2, a tripping control port P11 and a first voltage test port P31; the first disconnection test port P1 includes two terminals connected to two ends of the auxiliary contact of the main breaker QF1, respectively; the second disconnection test port P2 includes two terminals connected to two ends of the auxiliary contact of the bypass breaker QF2, respectively; the tripping control port P11 comprises two terminals which are respectively connected with two ends of a shunt release coil of the main circuit breaker QF 1; a first voltage sampling endpoint T1 is arranged at the positive terminal of the lead-acid battery, and the first voltage sampling endpoint T1 is connected with a first voltage test port P31 of the controller.
2. The circuit arrangement for preventing overdischarge of a lead-acid battery as claimed in claim 1, wherein: the circuit device further comprises a contactor K1, the positive bus Pbus comprises a first section of positive bus and a second section of positive bus, the first section of positive bus and the second section of positive bus are connected through a contactor K1, and the control end of the contactor K1 is controlled to be connected to the controller; the positive end of the lead-acid battery is connected with a first section of positive bus through a main breaker QF1, the positive end of the main power supply is connected with a second section of positive bus, and the positive end of the power supply input end of the controller is connected with the first section of positive bus; the load comprises an important load and a secondary load, the positive end of the important load is connected with the first section of positive bus, the positive end of the secondary load is connected with the second section of positive bus, and the negative ends of the important load and the secondary load are both connected with the negative bus Nbus; the controller further comprises a second voltage testing port P32 and a third voltage testing port P33, wherein the second voltage testing port P32 is connected with the second voltage sampling end point T2, and the third voltage testing port P33 is connected with the third voltage sampling end point T3.
3. The circuit arrangement for preventing overdischarge of a lead-acid battery for a backup power supply according to claim 1 or 2, wherein: the circuit arrangement further comprises a fuse FUS connected in series between the first voltage sampling endpoint T1 and a parallel circuit breaker, which is a main circuit breaker QF1 and a bypass circuit breaker QF2 connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922025989.2U CN211377614U (en) | 2019-11-21 | 2019-11-21 | Circuit device for preventing spare power source lead-acid battery from over-discharging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922025989.2U CN211377614U (en) | 2019-11-21 | 2019-11-21 | Circuit device for preventing spare power source lead-acid battery from over-discharging |
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| Publication Number | Publication Date |
|---|---|
| CN211377614U true CN211377614U (en) | 2020-08-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922025989.2U Active CN211377614U (en) | 2019-11-21 | 2019-11-21 | Circuit device for preventing spare power source lead-acid battery from over-discharging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211377614U (en) |
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2019
- 2019-11-21 CN CN201922025989.2U patent/CN211377614U/en active Active
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| GR01 | Patent grant | ||
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Address after: Room 1001, 10 / F, office building, Shihu Jinling Plaza, 88 Nanxijiang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province, 215128 Patentee after: DuPu (Suzhou) New Energy Technology Co.,Ltd. Patentee after: JIANGSU DUPU NEW ENERGY TECHNOLOGY Co.,Ltd. Address before: 201804 room 108, floor 1, building 1, No. 6988, Jiasong North Road, Anting Town, Jiading District, Shanghai J67 Patentee before: SHANGHAI DUPU NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: JIANGSU DUPU NEW ENERGY TECHNOLOGY Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Circuit device for preventing over discharge of lead-acid battery of standby power supply Effective date of registration: 20220114 Granted publication date: 20200828 Pledgee: Industrial and Commercial Bank of China Limited Suzhou Wuzhong sub branch Pledgor: DuPu (Suzhou) New Energy Technology Co.,Ltd. Registration number: Y2022320010022 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230202 Granted publication date: 20200828 Pledgee: Industrial and Commercial Bank of China Limited Suzhou Wuzhong sub branch Pledgor: DuPu (Suzhou) New Energy Technology Co.,Ltd. Registration number: Y2022320010022 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231127 Address after: Room 1001, 10 / F, office building, Shihu Jinling Plaza, 88 Nanxijiang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province, 215128 Patentee after: DuPu (Suzhou) New Energy Technology Co.,Ltd. Patentee after: VOLKSWAGEN AG Address before: Room 1001, 10 / F, office building, Shihu Jinling Plaza, 88 Nanxijiang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province, 215128 Patentee before: DuPu (Suzhou) New Energy Technology Co.,Ltd. Patentee before: JIANGSU DUPU NEW ENERGY TECHNOLOGY Co.,Ltd. |
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